be up yourself(British & Australian very informal)
to think that you are better and more important than other people She's so up herself ever since she landed this new job, it's unbearable.
See also: up
1. To have reached some high position: Now that all the sails are up, the boat will move pretty quickly. The cat is up the tree again.
2. To be awake: Although it was two o'clock in the morning, I was still up because I had drunk so much coffee.
3. To be in an energetic or positive mood: I was really up about the painting I had finished; it was one of my better efforts. She was tired and worried and wasn't feeling very up that day.
4. To have been used to completion. Used especially of time: Please get off the computer; your time is up. My luck has gone, and all of my chances are up.
5. To be put to an end, especially by being revealed: Your schemes are up; you should just admit what you did.
6. To be next in line for something: I've been waiting to buy tickets for hours, and I am finally up next.
7. To be occurring. Used especially of noteworthy or unusual events: The noises from the cellar are strange; I'll go down and see what is up.
8. be up against To have someone or something as an adversary or challenge: This year our team will be up against yours for the first time. The shopkeepers were up against some serious difficulties when the tax laws changed.
9. be up before To appear in some court of law: Their case is up before the Supreme Court. I was up before the local courthouse for failure to pay my liquor license.
10. be up for To be visiting a place for some purpose: My roommate from college is up for a visit.
11. be up for To be positive about or capable of doing something: Are you up for another coffee before we go home? Don't make them try to walk such a distance; they are not up for it.
12. be up to To have reached some quantity: The temperature is now up to forty degrees. We are now up to four weeks without rain.
13. be up to To have something as a possible upper limit: The prices can be up to three times higher in the big cities.
14. be up to To be doing something: I don't want to know what he is up to in the kitchen. What are you up to this afternoon?
See also: up